About Us

About Diesel Fuel Injection Service (DFIS)

We Do Everything.

Mission & values

At Diesel Fuel Injection Service (DFIS), diesel isn’t just what we do — it’s what we know inside and out. For decades, DFIS has been a trusted name in diesel fuel injection, turbocharger, injector, and pump service, serving customers locally in the Pacific Northwest and nationwide.

Built on hands-on experience, technical precision, and a commitment to doing things right, DFIS has grown from a specialized diesel repair facility into a full-service diesel parts and solutions provider.

Precision-Driven Quality
Every turbo, injector, and fuel system part we sell is carefully selected and backed by real in-house diesel experience. If we wouldn’t run it in our own shop, we won’t sell it.
Diesel Expertise You Can Trust
Our team rebuilds, tests, and services diesel components every day. That hands-on knowledge helps ensure you get the right part for your exact application.
Fast, Reliable Fulfillment
Downtime costs money. We prioritize accurate order processing and dependable shipping so you get the parts you need—when you need them.
Customer-First Support
Have a question before or after you order? Our team is here to help with fitment, guidance, and support from checkout to installation.

Built on Experience. Driven by Diesel.

DFIS was founded by diesel professionals who believed customers deserved more than guesswork and generic parts. From the beginning, our focus has been on accurate diagnostics, expert rebuilding, and dependable results.

Today, that same philosophy drives everything we do — whether we’re rebuilding a critical component in-house or supplying the correct parts for your exact application.

More Than Service — Trusted Diesel Parts

In addition to our in-house rebuilding and repair services, DFIS now offers a carefully curated selection of diesel performance and replacement parts, including components related to:

Turbochargers & Turbo Components
Fuel Injectors & Injector Systems
Fuel Injection Pumps
Supporting hardware, seals, and accessories

Because we work with these systems every day, we don’t just sell parts — we understand how they work together. Every product we offer is selected with performance, reliability, and real-world fitment in mind.

Whether you’re repairing a stock engine, upgrading for performance, or maintaining a fleet, our parts are backed by real diesel expertise — not guesswork.

One Team. One Standard.

From the service counter to the test bench, our team operates with one shared focus: delivering dependable diesel solutions the right way.

Whether you’re here for service or parts, DFIS means working with experienced diesel professionals who understand the systems, respect the details, and stand behind their work.

Owner

Adam Ofstad

Adam Ofstad serves as President of Diesel Fuel Injection Service, leading the company with a hands-on background in diesel repair, automotive service, and business operations. Based in Scappoose, Oregon, Adam has spent his career building companies rooted in quality workmanship, dependable service, and a deep understanding of the diesel and automotive industries.

With a background as a lifelong gearhead, firefighter, and business owner, Adam brings practical experience and a strong work ethic to every part of the operation. His leadership continues to guide the growth of Diesel Fuel Injection Service, from fuel injection and heavy-duty diesel repair to parts, service, and e-commerce support. Adam remains focused on building a team and customer experience centered around trust, technical knowledge, and long-term reliability.

CFO

Lily Ofstad

Lily Ofstad leads operations and finance across the PAD family of brands, which she owns and operates alongside her husband, Adam Ofstad. Based in Scappoose, Oregon, the group spans automotive and diesel repair, fleet service, heavy-duty truck and tire service, fuel injection, transmission repair, collision and vehicle wraps, towing, overland vehicle builds, and e-commerce storefronts.

With a background in the automotive industry — particularly diesel — Lily directs financial management, payroll, and marketing across all companies, and has built the reporting and data systems that support the group's growth: live performance dashboards, service-writer tracking, and weekly analytics that tie every location together into one coordinated operation. She also plays a key role in the continued development and operations of Diesel Fuel Injection Service.

Founder

Mark

Mark was the founder of DFIS and played an important role in building the company’s foundation, reputation, and commitment to quality service. His knowledge, work ethic, and dedication helped shape DFIS into the trusted diesel fuel injection service provider it is today. The standards he set continue to guide the team’s approach to customer care, technical expertise, and dependable service. His legacy remains an important part of the company’s story and values.

Service Manager

Kyle

Kyle is the Service Manager at DFIS, helping oversee daily shop operations and keeping service work moving efficiently. He plays an important role in coordinating repairs, supporting the technician team, and making sure customers receive clear communication throughout the process. His leadership, organization, and commitment to quality help ensure each job is handled with care. Kyle is a valued part of the DFIS team and helps deliver the dependable service customers have come to expect.

Master Technician

Grant

Grant is the Master Technician at DFIS, bringing strong technical knowledge and hands-on experience to the shop. He plays a key role in diagnosing, repairing, and servicing diesel fuel injection systems with precision and care. His attention to detail and commitment to quality help ensure each job is completed accurately and efficiently. Grant is a valued part of the DFIS team and helps deliver the dependable service customers count on.

Service Advisor

Bryan

Bryan is a Service Advisor at DFIS, helping customers navigate their service needs from start to finish. He plays an important role in communicating with customers, coordinating repair information, and helping ensure each job moves smoothly through the shop. His customer-focused approach and attention to detail help create a dependable service experience. Bryan is a valued part of the DFIS team and helps keep customers informed and supported throughout the process.

Office Manager

Christy

Christy brings over 20 years of experience in the diesel industry, with extensive product knowledge and hands-on expertise, especially with Cummins PT fuel systems. As Office Manager, she plays an important role in daily operations, including parts sourcing, customer service, and accounts receivable. She is known for her fairness, transparency, and dedication to helping customers find the right solutions at the best value. Outside of work, Christy is a proud grandmother of ten and brings that same care, reliability, and commitment into everything she does at DFIS.

Accounts Payable

Stephanie

Stephanie supports the DFIS team through her work in accounts payable, helping keep daily financial operations organized and running smoothly. She plays an important role in processing vendor invoices, managing payments, and maintaining accurate records. Her attention to detail and dependable approach help support both the office team and overall business operations. Stephanie is a valued part of the DFIS team and helps ensure things stay on track behind the scenes.

Let’s Keep You Moving

Explore our diesel parts catalog, learn more about our services, or contact our team for application-specific support. Whether you need a rebuild, a replacement, or the right part the first time — DFIS has you covered.

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